Lock



' 1,568,916 A. PELZER LOCK Filed Oct. 11, 1924 s Sheets-Sheet 1 INVENTOR ATTORN EY WITNESS:

Jim. 5,1926.

A. PELZER LOCK Filed Oct. 11. 1924 3 Sheets-Sheet 2 WITNZSS:

Jan. 5 1926. 1,568,916

A. PELZER LOCK Filed 001:. 11, 1924 3 Sheets-Sheet 5 Adofoi 1 69 1:

INVENTOR ATTORNEY WlTNESS:

the unlocking movement and Patented Jan. 5, 1926.

UNITED STATES 1,568,916 PATENT OFFICE.

ADOLPH Primer, or TACOMA, wasnmeron.

LOCK.

Application filed October 11, 1924. Serial No. 743,054.

To all whom it may concern:

Be it known that I, Anonrn: PnLZEn, a citizen of Russia, residing at Tacoma, in the county of Pierce and State of \Vashington, have invented new and useful Improvements in Locks, of which the following is a spe ification.

This invention relates to a lock, the general object of the invention being to pro vide means whereby the main or dead bolt cannot be unlocked until the key is first turned in the direction of the locking movcment and then in the reverse direction.

Another object of the invention is to provide means whereby the key can be used for retracting the latch bolt with means for preventing this action of the latch bolt un less a certain type of key is being used. 1

This invention also consists in certain other features of construction and in the combination-and arrangement of the several parts, to be hereinafter fully described,

illustrated in the accompanying drawings and specifically pointed out in the appended claim. i i

In describing my invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure 1 is a view of theimproved lock with the cover plate removed.

Figure 2 is a section on line 2-2 of Fig ure 1.

Figure 3 is a view of the lower part of the lock with the bolt projected and parts removed.

' Figure 4 is a view showing the parts in locked positiointhe same as in Figure 8, but showing the locking lever in position.

Figure 5 is a view showing the first movement of the key in the unlocking action.

Figure 6 a view of the second step in showing the locking lever in. position.

Figure 7 is a view showing the third step in the locking movement with the locking lever removed.

Figure 8 is a view showing the second rotation of the key for retracting the latch bolt.

Figure 9 is a view showing the parts in the position which they occupy when the latch bolt has been retracted. J

Figure 10 is a view showing the latch bolt retracted by the key and the parts omitted.

Figure 11 is a view of the locking spring.

Figure 12 is a view of one of the springs used in the device.

Figure 123 is a view of one of the tumblers.

liigure let is a view of the spring for engaging'the notched tumbler.

Figure 15 is a View of this notched tumbler.

Figure 16 a view of the lever for moving the latch bolt.

Figure 1.7 is a view of the lever for 1noving the lever shown in Figure 16. I

In these views 1 indicates the lock casing and 2 the cover plate therefor, the casing and its cover being provided with the usual projections "for parts of the lock. The latch bolt is shown at 3 and the knob operated members for actuating the same are shown generally at at. The usual plungers 5 are used for permitting the parts to be locked so that the latch bolt cannot be retracted from the outside knob'or set so that the bolt can be retracted bythe outside knob. As these parts are formed as usual they will not be described in detail. The main or dead bolt is shown at 6 and it comprises a plate-like body 6 to which is attached a block 6 which forms {the keeper engaging head of the bolt- The body has a notch 7 in its upper edge which is engaged by the locking spring 8 when the bolt is projected and this spring prevents the bolt from being retracted until the spring is moved out of the notch. A T-shaped tumbler 9 is pivoted to the bolt and a leaf spring 10 tends to press it downwardly away from the notched edge of the bolt and a notched tumbler 11 is pivoted to the bolt and is adapted to be oper ated by a key such as shown at 'A for moving the tumbler 9 upwardly spring 8 out of the notch 7. The tumbler 11 is held inits lowest position by a spring 12.- Theseparts are so arranged that the spring 8 will prevent the bolt from being retracted by the key until the key is moved in a counter-clockwise direction, as shown by the arrow (1 in Figure 3, which action will cause a part of the key to engage the lower end of the tumbler 11 to tilt the same until the key engages the notch 11 in the tumbler and this movement of the tumbler 11 will raise the tumbler 9 to cause said tumbler 9 to force the spring 8 out of the notch 7. Then the key is turned in a reverse direction which will retract the bolt, Thus to force the guiding and holding the it is necessary to partially rotate the key in the same. direction that the key is turned to project the bolt before the lock can be rctracted by the turning of the key in the usual direction. I also provide a lever 13 for holding the bolt in projected and retracted position by means of the opening ll: therein forming shoulders for engaging the projection 15 on the body of the bolt when the same is in either its projected or retracted positions. This lever is engaged by part of the key and raised just before the bolt is projected or retracted by the key. This lever is normally held in its lowered position by means of the spring 16, the lever engaging a stop 17 on the casing when in its lowered position. I also provide means whereby the key will retract the latch bolt. such means consisting of a lever 17' pivoted to the bolt and having a part engaging the latch bolt 8 and having a laterally. extending lip 18 thereon which is engaged by a rounded end of a lever 19 pivoted to the bolt 6 and having a projection 20 on its lower end which is adapted to be engaged by a part on the key when the bolt 6 is in retracted position so that the latch bolt can be retracted by the key. Inorder to prevent the retraction of the latch bolt by a key other than that for which the lock is designed, I provide a lever 21 which is provided with an opening 22 for receiving an car 23 on the lever 19 and which has a small part 24- for receiving the ear when the said lever 19 is in a position to be engaged by the key. The member 21 must be moved to a certain position by the key in order to permit the ear 23 to enter the part 2% of the opening for otherwise the car will engage either the upper or lower end wall of the large part of the opening and thus hold the lever 19 in a position where it cannot be reached by the key. The end of the member 21 is held against the stop 17 by a spring 25 and it is provided with a beveled edge 26 for engaging a notch 27 in the key.

From the foregoing it will be seen that I have provided means whereby the key must be turned in the same direction that it would be turned to project the bolt in order to set the parts to a position where the key can be turned, in the usual manner, and in addition I have provided a locking lever, moved by the key, to hold the bolt in its projected or retracted position and other means whereby the key can be used tor rctracting the latch bolt, such means including parts for preventing this retraction of the latch bolt unless the key for which the lock is designed is used. The locking lever also serves as means for preventing the boltv being operated by a key other than that for which the lock is designed.

It is thought from the foregoing description that the advantages and novel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the construction and in the combination and arrangement of the several parts, provided that such changes tall within the scope of the appended claim.

\Vhat I claim is:-

In a lock, a dead bolt, a latch bolt, said dead bolt having a notch therein, a locking member for engaging the notch when the boltis in projected position, a pair of tumblers on the dead bolt, a key for engaging one tumbler when the key is moved in an anti-clockwise direction to cause said tumbler to move the other tumbler to position where it will force the locking member from the notch so that when the key moved in an opposite direction it will retract the dead bolt, a projection on the dead bolt, :1 pivoted lever having an opening. therein for engaging the projection, said opening forming a pair of shoulders which act to hold the dead bolt in either its retracted or projected positions, said lever having a key engaging part whereby the key will move the same to release the projection from the shoulders, a lever on the boltand engaging the latch bolt, a second lever on the bolt and having a part engaging the first lever, a key engaging part on the second lever whereby the key will move the lovers to retract the latch bolt, a projection on the second lever, a lever pivoted to the lock casing and having an opening therein for receiving the projection on the second lever, said opening having a restricted part which will receive the projection when the lever has been moved to a certain position by the key to permit movement of the first and second levers by the key.

In testimony whereof I affix my signature.

ADOLPH PELZER. 

